Mattel, Inc.
US ˙ NasdaqGS ˙ US5770811025

SecurityMAT / Mattel, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership295,918 shares
Latest Disclosed Value $ 4,299,689
Engineers Gate Manager LP reports 12.83% increase in ownership of MAT / Mattel, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 295,918 shares of Mattel, Inc. (US:MAT) valued at $4,299,689 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 262,259 shares of Mattel, Inc.. This represents a change in shares of 12.83% during the quarter. The current value of the position is $4,243,464 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MATTEL COM 577081102 295,918 33,659 12.83 4,300 -17.37 0.0537
2026-02-17 2025-12-31 13F MATTEL COM 577081102 262,259 196,586 299.34 5,203 370.86 0.0617
2025-11-14 2025-09-30 13F MATTEL COM 577081102 65,673 65,673 1,105 0.0127
2025-05-15 2025-03-31 13F MATTEL COM 577081102 0 -86,414 -100.00 0 -100.00
2025-02-14 2024-12-31 13F MATTEL COM 577081102 86,414 -102,339 -54.22 1,532 -57.39 0.0267
2024-11-14 2024-09-30 13F MATTEL COM 577081102 188,753 -56,348 -22.99 3,596 -9.79 0.0702
2024-08-14 2024-06-30 13F MATTEL COM 577081102 245,101 62,084 33.92 3,985 9.93 0.0899
2024-05-15 2024-03-31 13F MATTEL COM 577081102 183,017 33,472 22.38 3,626 28.41 0.0954
2024-02-14 2023-12-31 13F MATTEL COM 577081102 149,545 113,221 311.70 2,823 252.88 0.0806
2023-11-14 2023-09-30 13F MATTEL COM 577081102 36,324 36,324 800 0.0296
2023-08-14 2023-06-30 13F MATTEL COM 577081102 0 -15,630 -100.00 0 -100.00
2023-05-15 2023-03-31 13F MATTEL COM 577081102 15,630 -105,726 -87.12 288 -86.74 0.0120
2023-02-14 2022-12-31 13F MATTEL COM 577081102 121,356 121,356 2,165 0.1300
2022-08-15 2022-06-30 13F MATTEL COM 577081102 0 -91,369 -100.00 0 -100.00
2022-05-16 2022-03-31 13F MATTEL COM 577081102 91,369 24,768 37.19 2,029 41.30 0.0794
2022-02-14 2021-12-31 13F MATTEL COM 577081102 66,601 14,879 28.77 1,436 49.58 0.0646
2021-11-15 2021-09-30 13F MATTEL COM 577081102 51,722 51,722 960 0.0547
2021-08-16 2021-06-30 13F MATTEL COM 577081102 0 -54,700 -100.00 0 -100.00
2021-05-17 2021-03-31 13F MATTEL COM 577081102 54,700 -33,670 -38.10 1,090 -29.31 0.0540
2021-02-16 2020-12-31 13F MATTEL COM 577081102 88,370 74,002 515.05 1,542 817.86 0.0669
2020-11-16 2020-09-30 13F MATTEL COM 577081102 14,368 14,368 168 0.0079
2020-05-15 2020-03-31 13F MATTEL COM 577081102 0 -45,976 -100.00 0 -100.00
2020-02-14 2019-12-31 13F MATTEL COM 577081102 45,976 45,976 623 0.0274
2017-02-10 2016-12-31 13F MATTEL COM 577081102 0 -29,500 -100.00 0 -100.00
2016-11-09 2016-09-30 13F MATTEL COM 577081102 29,500 20,200 217.20 893 206.87 0.0930
2016-08-11 2016-06-30 13F MATTEL COM 577081102 9,300 -98,263 -91.35 291 -91.95 0.0209
2016-05-09 2016-03-31 13F MATTEL COM 577081102 107,563 97,163 934.26 3,616 1,177.74 0.2819
2016-02-05 2015-12-31 13F MATTEL COM 577081102 10,400 10,400 0.00 283 0.0191
2015-11-16 2015-09-30 13F MATTEL COM 577081102 0 -9,600 -100.00 0 -100.00
2015-08-14 2015-06-30 13F MATTEL COM 577081102 9,600 -77,898 -89.03 247 -87.64 0.0242
2015-05-15 2015-03-31 13F MATTEL COM 577081102 87,498 71,083 433.04 1,999 293.50 0.2658
2015-02-17 2014-12-31 13F MATTEL COM 577081102 16,415 16,415 508 0.1447
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.